On Wed, May 26, 2021 at 17:07:23 +0700, Nhi Pham wrote:
> LinuxBoot is a firmware that replaces specific firmware functionality
> like the UEFI DXE phase with a Linux kernel and runtime. At the end of
> the DXE phase, UEFI will hand over the control to the LinuxBoot kernel.
>
> This package contains the LinuxBoot binary (flashkernel) which is built
> and added manually by following the instructions in the Readme.md
> ("Platform/Ampere/LinuxBootPkg/AArch64/Readme.md").
>
> Cc: Thang Nguyen <thang@os.amperecomputing.com>
> Cc: Chuong Tran <chuong@os.amperecomputing.com>
> Cc: Phong Vo <phong@os.amperecomputing.com>
> Cc: Leif Lindholm <leif@nuviainc.com>
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
> Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
>
> Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
/
Leif
> ---
> Platform/Ampere/LinuxBootPkg/LinuxBoot.inf | 17 ++++++++++++
> Platform/Ampere/LinuxBootPkg/AArch64/Readme.md | 29 ++++++++++++++++++++
> 2 files changed, 46 insertions(+)
>
> diff --git a/Platform/Ampere/LinuxBootPkg/LinuxBoot.inf b/Platform/Ampere/LinuxBootPkg/LinuxBoot.inf
> new file mode 100644
> index 000000000000..5e8f6f83dfb2
> --- /dev/null
> +++ b/Platform/Ampere/LinuxBootPkg/LinuxBoot.inf
> @@ -0,0 +1,17 @@
> +## @file
> +#
> +# Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +##
> +
> +[Defines]
> + INF_VERSION = 0x0001001B
> + BASE_NAME = LinuxBoot
> + FILE_GUID = D834A5AD-459C-4AED-B0D0-8CBCB28838D7
> + MODULE_TYPE = UEFI_APPLICATION
> + VERSION_STRING = 1.0
> +
> +[Binaries.AArch64]
> + PE32|AArch64/flashkernel|*
> diff --git a/Platform/Ampere/LinuxBootPkg/AArch64/Readme.md b/Platform/Ampere/LinuxBootPkg/AArch64/Readme.md
> new file mode 100644
> index 000000000000..92c6c3165eac
> --- /dev/null
> +++ b/Platform/Ampere/LinuxBootPkg/AArch64/Readme.md
> @@ -0,0 +1,29 @@
> +# flashkernel
> +
> +The LinuxBoot image, named flashkernel, is required to build the final EDK2 image with LinuxBoot support.
> +The flashkernel image consists of [Linux](https://kernel.org) kernel and initramfs generated using [u-root](https://github.com/u-root/u-root).
> +
> +## Overview
> +
> +LinuxBoot is a firmware that replaces specific firmware functionality
> +like the UEFI DXE phase with a Linux kernel and runtime. It is built-in
> +UEFI image like an application as it will be executed at the end of DXE phase.
> +
> +The flashkernel is built completely from the [linuxboot/mainboards](https://github.com/linuxboot/mainboards) repository.
> +
> +## How to build
> +
> +1. Clone the `linuxboot/mainboards` repository:
> +
> + ```Bash
> + git clone https://github.com/linuxboot/mainboards.git
> + ```
> +
> +2. Build with the following command:
> +
> + ```Bash
> + cd ampere/jade
> + make fetch flashkernel
> + ```
> +
> +Once the build is done, copy the flashkernel into the edk2-platform under the `Platform/Ampere/LinuxBootPkg/AArch64` directory.
> --
> 2.17.1
>
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